the fbi is investigating. and dozens of u.s. marines have been sent to beef up security for americans in libya. cnn's jomana karadsheh is on the phone. she's joining us from tripoli, libya, right now. jomana, tell us what happened based on all of the evidence, all of the reporting you're doi doing. [ technical difficulties ] jomana, i don't know if you can hear me. i'll try to fix that and get back to you. i think we've lost connections with jomana. we're going to get back to her. let me walk over here. the chairman of the house intelligence committee, mike rogers, is standing by. he's got -- he's been fully briefed on what's going on. mr. chairman, thanks very much for coming in. >> thanks, wolf. thanks for having me. >> based on what you have been told and all the information you have what you can share with our viewers here in the united states and around the world, first of all, who did this? who killed these four americans? >> the actual identity we're still working through the final details of exactly. i think we're gettin